Improvement in machines for grinding lenses



y r; n. n w. n. suTTnn.

Machinesfor Grinding Lenses.,

N0.l50,799, Patented Mayl2,187 4.

UNITED S FREDERICK It.. SUTTON AND WILLIAM O. SUTTON, OF TWELLINGTON, ILL.

IMPROVEMENT INl MACHINES FOR GRINDING LENSES.

Specification forming part of Letters Patent No. 150,799, dated May l2, 1874 application filed September 13, 1873.

To all whom z't may concern:

Be it known that we, FREDERICK R. SUT- TON and WILLIAM O. SUTTON, of Wellington, in the county of Iroquois andState of Illinois, have invented a new and 'Improved Machine for Grinding Lenses, of which the following is a specification:

We propose to havea holder for the lens to be ground, revolving, say, in a horizontal plane ou a vertical axis, and a grinder revolving in a vertical plane on a horizontal axis, the inner periphery of the grinder Working in contact with the face of the lens for grinding convex lenses. v

Figure 1 is aside elcvation of a machine arranged for grinding convex' lenses; and Fig. 2 is a horizontal section of Fig. 1, taken on the line x x.

Similar letters oi' reference indicate corresponding parts.

A represents a chuck, holding the lens B to be ground.V It is mounted on a short vertical axis, C, supported in a frame, D, and provided With a pulley, E, by which it is revolved by a belt, F, from a drum on the shaft G. The frame Dis capable of vertical adjustment, and provided with an adj Listing-screw, H. I is the grinder, which, for grinding convex lenses, will be in the form of a ring. It is mounted on the branching arms J of a horizontal axis, K, so that the lens and its chuck and mandrel can be presented within the ring for the inner periphery of the latter to run against the face of the lens, While the lens revolves on an axis in the plane of the ring, and atv right angles to its axis, 'as clearly shown in the drawing,

by which great accuracy is obtained. For

feeding up the lens to the grinder, the frame D is arranged to slide in its support L. The axis K is geared with the driving-shaft M by .a belt, N, and pulleys. Itis, of course, imma terial Whether the chuck be O11 a vertical axis and the grinder on a horizontal one, so long as they be at right angles to each other. The standard O, which supports the grinder-axis,

is adjustable at I) on the frame Q, so as to I move the grinder away from the lens -chuck to facilitate the adjusting of the lens. The supporting-bar Q is arranged on trunnions R to swing to any inclination, and is locked by pins S. The pivoting of frame is employed to enable the said frame to be shifted in posiy H, the driving-shafts Gr and M, and the belts F N, all substantially as specified.

FREDERICK R. SUTTON. NVILLIAM O. SUTTON.

Witnesses GEORGE W. Goni), CHARLEsL. Hansis. 

